Ultraviolet and infrared absorptive greenish glass

ABSTRACT

The present invention relates to an ultraviolet and infrared absorptive greenish glass (the first glass) containing in weight % expression at least coloring components of 0.3-0.5% of total Fe 2 O 3 , 0.8-2.0% CeO 2 , 0.8-2.0% TiO 2 , and 0.10-0.25% of FeO. This first glass may be an ultraviolet and infrared absorptive greenish glass (the second glass) in which CeO 2  amounts to 0.8-1.5% and TiO 2  amounts to 0.8-1.5%, and which contains at least 0.1-0.7% SnO as a coloring component. Each glass is characterized in each glass at 5 mm thickness is 9% or less in ultraviolet transmittance (T uv ) according to ISO/DIS9050, 1% or less in 350 nm wavelength transmittance (T 350 ), 70% or greater in 550 nm wavelength transmittance (T 550 ), and 25% or less in 1100 nm wavelength transmittance (T 1100 ).

TECHNICAL FIELD

The present invention relates to an ultraviolet and infrared absorptivegreenish glass that makes high inhabitability possible by having arelatively high transparency and infrared and ultraviolet shielding.

BACKGROUND OF THE INVENTION

Hitherto, from the viewpoint of energy conservation represented by thereduction of cooling load, there has been a social stream towardreducing the effect of infrared rays as much as possible. Such streamtends to be increased more and more due to the increase of interestabout global warming phenomena and environmental problems and the like.This stream brings about various changes to glass industry. By providingglass itself or the glass surface with the absorption function and thereflection function, glasses that reduce the effect of infrared rayshave been developed, and they have been commercialized as infraredabsorptive glasses or infrared reflective glasses.

There is known a soda-lime-silica glass (see Patent Publication 1) thathas a composition comprising by weight % 66-75% SiO₂, 12-20% Na₂O, 7-12%CaO, 0-5% MgO, 0-4% Al₂O₃, 0-3% K₂O, 0-1% Fe₂O₃, and 0-1.5% of the totalof CeO₂, TiO₂, V₂O₅ or MoO₃, that is a glass article in which the totaliron is in at least 0.45 weight %, and its 35% or greater is of an ironthat is in the ferrous iron condition represented by FeO, and less than0.02 weight % of sulfur expressed as SO₃ is contained, and that is of aninfrared absorptive type showing a visible light transmittance (400-770nm) of at least 65% and an infrared transmittance (800-2100 nm) of notgreater than 15%.

There is a social movement towards reducing the effect of ultravioletrays as much as possible, such as ultraviolet deterioration of organicmaterials represented by fading phenomena and the occurrence of skincancer by ultraviolet irradiation. In view of such movement, there is astudy of a commercial product that reduces the effect of ultravioletrays by providing the glass itself or the glass surface with theultraviolet absorptive function and reflective function. Itsrepresentative example is ultraviolet absorptive glass.

There is known an ultraviolet absorptive colored glass (see PatentPublication 2) which has a composition substantially comprising byweight % 65-75% SiO₂, 0.1-5 Al₂O₃, 10-18% Na₂O, 0-5% K₂O, 5-15% CaO,1-6% MgO, 0.05-1.0% SO₃, 0.2-1.5% Ce moiety in terms of CeO₂, 0-1.0% Timoiety in terms of TiO₂, 0.001-0.006% CoO, 0.3-1.6% Fe moiety in termsof Fe₂O₃, and in which 5-18 wt % of the Fe moiety in terms of Fe₂O₃ isof Fe²⁺.

There are described in this patent publication that the dominantwavelength measured with C light source is 488-492 nm and the colorpurity is 3-4%, that the visible light transmittance measured at athickness of 3-5 mm with A light source is 70% or greater, that theultraviolet transmittance defined in ISO is 15% or less, that, if thecontent of CoO is less than 0.001%, the dominant wavelength becomes toolong, thereby having a yellow color tone, and that, if it is greaterthan 0.006%, the dominant wavelength becomes too short, thereby notobtaining a bluish glass.

Furthermore, it has changed to a stream to simultaneously reduce theeffect by ultraviolet rays and the effect by infrared rays. This streamis in a direction to increase more and more due to the increasedinterest in global warming phenomena and environmental problems and thelike. In this stream, a so-called ultraviolet and infrared absorptiveglass that absorbs both of ultraviolet rays and infrared rays attractsattention, in addition to conventional infrared absorptive glass andultraviolet absorptive glass.

There is disclosed an infrared and ultraviolet absorptive,soda-lime-silica, greenish glass (see Patent Publication 3), whichcontains as major components 0.65-1.25 wt % Fe in terms of Fe₂O₃,0.2-1.4 wt % CeO₂ or 0.1-1.36 wt % CeO₂ and 0.02-0.85 wt % TiO₂, and inwhich the weight ratio of FeO to Fe₂O₃ is fixed to have at a thicknessof 3-5 mm an Illuminant A visible light (wavelength 400-770 nm) of 70%or greater, a total solar energy (wavelength: 300-2130 nm) transmittanceof 46% or less and an ultraviolet (wavelength 300-400 nm) transmittanceof 38% or less.

There are described in this patent publication that the above Fe is0.48-0.92 wt % Fe₂O₃ and 0.15-0.33 wt % FeO, that the weight % of FeOconstitutes a reduction percent of 23-29% of the total iron contentexpressed as Fe₂O₃, that Illuminant C dominant wavelength is 498-525 nm,that the color purity is 2-4%, and that 65-75 wt % SiO₂, 10-15 wt %Na₂O, 0-4 wt % K₂O, 1-5 wt % MgO, 5-15 wt % CaO and 0-3 wt % Al₂O₃ arecontained.

There is disclosed an infrared and ultraviolet absorptive glass (seePatent Publication 4), which substantially comprises in terms of oxide65-75 wt % SiO₂, 0.1-5 wt % Al₂O₃, 10-18 wt % Na₂O, 0-5 wt % K₂O, 5-15wt % CaO, 1-6 wt % MgO, 0.1-3 wt % CeO₂, 0.5-1.2 wt % Fe₂O₃, 0.05-1.0 wt% SO₃, and 0-1.0 wt % TiO₂, and in which 20-40% by weight of the totaliron content expressed as Fe₂O₃ are in ferrous iron (FeO).

There are described in this patent publication that a coloring agent maybe added to the glass of the above-mentioned compositional range to theextent that the total amount of one kind or two kinds or more of NiO,CoO, MnO, V₂O₅, MoO₃ and the like is in 0-1.5 wt %, that according toneed 0-3 wt % of ZnO may be added in order to prevent deterioration ofcolor tone by ultraviolet rays and coloring of amber, and that thevisible transmittance (380-780 nm) is 66.1-66.8%, the solar heattransmittance (340-1800 nm) is 37.7-38.4%, and the dominant wavelengthis 501-503 nm (green color) at 5 mm in thickness in examples.

There is disclosed an ultraviolet and infrared absorptive glass (seePatent Publication 5) which has a composition of 65-75% SiO₂, 0-5%Al₂O₃, 10-18% Na₂O, 0-5% K₂O, 5-15% CaO, 0-5% MgO, 0.1-3% CeO₂, 0.2-1%FeO, and 0.1-3% SnO₂ in weight %, which contains 0-1.5% of a coloringagent such as NiO, CoO, MnO, V₂O₅, MoO₃ and the like, 0-3% ZnO, and0.1-3% SnO₂, and in which the dominant wavelength is 488-497 nm.

The present applicant also discloses an ultraviolet and infraredabsorptive greenish glass (see Patent Publication 6) which contains byweight % 67-75% SiO₂, 0.05-5% Al₂O₃, 12-16% Na₂O, 0.5-3% K₂O, 7-11% CaO,2-4.2% MgO, 0.05-0.3% SO₃, 1.0-2.5% CeO₂, 0.1-1.0% TiO₂, 0.0010-0.0400%MnO, 0.0001-0.0009% CoO, and 0-1% SnO₂, and which has a composition of70-76% of SiO₂+Al₂O₃+TiO₂, 10-15% of CaO+MgO, and 13-17% of Na₂O+K₂O.

Furthermore, even in the same ultraviolet and infrared absorptiveglasses, their color tones are important. For example, green glass andblue glass are considered to be completely different commercialproducts. For example, it is actual that buildings that have been builtare formed of similar color tones and that the color tones are alsostrictly managed, except an extremely special example in which a patternis formed of color difference. There has also been a case in which rawmaterials that have not been problematic so far are also limited due tothe increased interest to the global environmental problems as comparedwith the past. Furthermore, the property requirement for variousmaterials has become strict. Thus, there has been a case of an extremelycomplicated condition in which raw materials and properties, which areusable for certain commercial products, cannot be used for othercommercial products.

As mentioned above, the environment surrounding glass has greatlychanged, and it is in a condition in which glasses satisfying thecomplicated requirement specifications have not been developedsufficiently. In particular, it is a social demand for the developmentof an ultraviolet and infrared absorptive greenish glass of apredetermined green color tone and of not using selenium as a rawmaterial.

Patent Publication 1: Japanese Patent Examined Publication 5-27578

Patent Publication 2: Japanese Patent Unexamined Publication 6-321577

Patent Publication 3: Japanese Patent Examined Publication 6-88812

Patent Publication 4: Japanese Patent Unexamined Publication 4-310539

Patent Publication 2: Japanese Patent Unexamined Publication 4-46031

Patent Publication 2: Japanese Patent Unexamined Publication 9-208254

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a glass thatachieves high performance infrared absorption and ultraviolet absorptiontogether with a greenish color tone with a good balance, that has asufficient transparency, and that has a predetermined greenish colortone.

According to the present invention, there is provided, in asoda-lime-silica series glass, an ultraviolet and infrared absorptivegreenish glass, which is characterized in that, in an expression ofweight %, it comprises at least coloring components of 0.3-0.5% of totalFe₂O₃, 0.8-2.0% CeO₂, 0.8-2.0% TiO₂, and 0.10-0.25% FeO, and that theglass at 5 mm thickness is 9% or less in ultraviolet transmittance(T_(uv)) according to ISO/DIS9050, 1% or less in 350 nm wavelengthtransmittance (T₃₅₀), 70% or greater in 550 nm wavelength transmittance(T₅₅₀), and 25% or less in 1100 nm wavelength transmittance (T₁₁₀₀).

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows transmittance curves of Example 1-1 and Comparative Example1-1.

FIG. 2 shows transmittance curves of Example 2-1 and Comparative Example2-1.

DETAILED DESCRIPTION

According to the present invention, it is possible to obtain a glassthat achieves high performance infrared absorption and ultravioletabsorption together with a greenish color tone with a good balance, thathas a sufficient transparency, and that has a predetermined greenishcolor tone. It is possible to improve productivity with increasedquality and yield and to produce with stable operation without greatlychanging the operation conditions and the plate forming conditions ofthe actual furnace in float process.

The present invention can be used for an electronic material field thatrequires ultraviolet and infrared absorptive properties, as well asconventional plate glass field such as architectural window glass andautomotive window glass.

The above-mentioned first glass may be an ultraviolet and infraredabsorptive greenish glass (the second glass), in which CeO₂ is in anamount of 0.8-1.5% and TiO₂ is in an amount of 0.8-1.5%, and whichfurther contains at least SnO of 0.1-0.7% as a coloring component. Thissecond glass is also characterized in that the second glass at 5 mmthickness is 9% or less in ultraviolet transmittance (T_(uv)) accordingto ISO/DIS9050, 1% or less in 350 nm wavelength transmittance (T₃₅₀),70% or greater in 550 nm wavelength transmittance (T₅₅₀), and 25% orless in 1100 nm wavelength transmittance (T₁₁₀₀). In other words, thesecond glass is one example of the first glass.

In the following, the ultraviolet and infrared absorptive, greenish,first and second glasses of the present invention are described indetail. In case that a description of each paragraph is not limited toeither the first glass or the second glass of the present invention, thedescription is a description common to the first and second glasses.

Fe₂O₃ functions as a component that absorbs ultraviolet rays and securesa predetermined color tone, and is necessary for stably obtainingvarious optical properties. In relation to analysis, the sum of iron isexpressed as Fe₂O₃. It is, however, total Fe₂O₃, since the form of FeOis included in this. In general, FeO absorbs infrared rays and isnecessary, together with Fe₂O₃ that absorbs ultraviolet rays and securesa predetermined color tone, and together with each coloring factor suchas CeO₂ and TiO₂. That is, if total Fe₂O₃ is less than 0.3%, thefunction to the above becomes inferior. If it exceeds 0.5%, there occursparticularly a problem of lowering of the visible light transmittance.Total Fe₂O₃ component is more preferably in 0.35-0.45% by weight %.

In the first glass, CeO₂ has mainly an ultraviolet absorptivefunction/effect. Its amount has been set to 0.8-2.0% by weight %,because there is a problem of an insufficient ultraviolet absorptivefunction in the case of less than 0.8%. On the other hand, if it exceeds2%, the oxidation function by CeO₂ becomes too strong, and the colortone of glass tends to have a yellowish color. Furthermore, there occursa problem of the increase of the raw material cost. More preferably, itis 0.9-1.9%. Further preferably, it is 1.0-1.8%.

Also in the second glass, CeO₂ has mainly an ultraviolet absorptivefunction/effect. Its amount has been set to 0.8-1.5% by weight %,because there is a problem of an insufficient ultraviolet absorptivefunction in the case of less than 0.8%. On the other hand, if it exceeds1.5%, the oxidation function by CeO₂ becomes too strong, and the colortone of glass tends to have a yellowish color. Furthermore, there occursa problem of the increase of the raw material cost. More preferably, itis 0.9-1.4%. Further preferably, it is 1.0-1.3%.

In the first glass, similar to CeO₂, TiO₂ also has mainly an ultravioletabsorptive function/effect. Its amount has been set to 0.8-2% by weight%, because there are in the case of less than 0.8% a problem of aninsufficient ultraviolet absorptive function and a problem of the colortone of glass becomes too blue in relation with other coloringcomponents. On the other hand, if it exceeds 2%, there occur a problemin which the color tone of glass tends to have a yellowish color and aproblem in which the visible light transmittance becomes too low. Morepreferably, it is 0.9-1.9%. Further preferably, it is 1.0-1.8%.

In the second glass, similar to CeO₂, TiO₂ also has mainly anultraviolet absorptive function/effect. Its amount has been set to0.8-1.5% by weight %, because there are in the case of less than 0.8% aproblem of an insufficient ultraviolet absorptive function and a problemof the color tone of glass becomes too blue in relation with othercoloring components. On the other hand, if it exceeds 1.5%, there occura problem in which the color tone of glass tends to have a yellowishcolor and a problem in which the visible light transmittance becomes toolow. More preferably, it is 0.9-1.4%. Further preferably, it is1.0-1.3%.

In the second glass, it is preferable that SnO is added in a range of0.1-0.7%. SnO has an effect of the reduction action and is effective foradjusting the color tone. It is possible to reduce the contents of othercoloring factors. It is possible to increase the infrared absorptivecapability and at the same time adjust the glass color tone. However, ifSnO is less than 0.1%, the above-mentioned effect becomes small, and itbecomes extremely difficult to obtain a color tone of green color. Onthe other hand, if it exceeds 0.7%, the reduction action becomes toostrong. Amber tends to appear, and the color tone of glass has a strongbluish color tone. Therefore, the present color tone is not preferable.More preferably, it is 0.2-0.5%.

The reason why they have been set to the above-mentioned ranges is thateach component is necessary for obtaining absorption of ultraviolet raysand infrared rays and a color tone of green color. Their balances areextremely important, and it is possible to obtain a desired greenishultraviolet and infrared absorptive glass.

The reason why an ultraviolet and infrared absorptive greenish glasshaving an ultraviolet transmittance (T_(uv)) of not greater than 9%according to ISO/DIS9050 at 5 mm thickness is preferable is that variousdeterioration problems occur by ultraviolet rays if it exceeds 9%.Herein, the ultraviolet transmittance (T_(uv)) according to ISO/DIS9050represents a transmittance in a wavelength region of 297.5-377.5 nm.Herein, the reason why it has been set to a wavelength region of297.5-377.5 nm is that both of a medium wavelength ultraviolet rays(UVB) of a wavelength of about 290-320 and a long wavelength ultravioletrays (UVA) of about 320-400 nm were taken into consideration.

The reason why an ultraviolet and infrared absorptive greenish glasshaving a 350 nm wavelength transmittance (T₃₅₀) of not greater than 1%is preferable is that an effect referred to as a so-called ultravioletdeterioration is great and that problems occur if it exceeds 1%. Herein,the reason why it has been represented by a light of 350 nm wavelengthis that there has been taken into account a long wavelength ultravioletrays (UVA) of a wavelength of about 320-400 nm, that is, so-called Aultraviolet rays that, for example, are strong in penetration into humanskin, that cause stain and sag by an action to fiber such as collagenfiber and elastic fiber in derma of skin, and that make stain andfreckle inferior by an action to melanin present in skin.

The reason why an ultraviolet and infrared absorptive greenish glasshaving a 550 nm wavelength transmittance (T₅₅₀) of not less than 70% at5 mm thickness is preferable is that there may occurs a problem intransparency that is one great characteristic of glass if it is lessthan 70%. Herein, the reason why it has been represented by a 550 nmwavelength light is that transmittance with green color is mainlyconsidered.

The reason why an ultraviolet and infrared absorptive greenish glasshaving a 1100 nm wavelength transmittance (T₁₁₀₀) of not greater than25% at 5 mm thickness is preferable is that, for example, the coolingload increases and thereby it contradicts with global warming phenomenaand environmental problems. Therefore, an ultraviolet and infraredabsorptive greenish glass having a 1100 nm wavelength transmittance(T₁₁₀₀) of not greater than 15% at 5 mm thickness may become preferable.

There is preferable the above ultraviolet and infrared absorptivegreenish glass which comprises in weight % expression 67-75% SiO₂,0.5-3.0% Al₂O₃, 7.0-11.0% CaO, 2.0-4.2% MgO, 12-16% Na₂O, 0.5-3.0% K₂O,and 0.05-0.3% SO₃ in addition to the above coloring components of glass,in which the sum of these components and the coloring components is 98%or greater, and in which SiO₂+Al₂O₃+TiO₂ is 70-76%, CaO+MgO is 10-15%,and Na₂O+K₂O is 13-17%.

The reason why SiO₂ component has been set to 67-75% by weight % is thatthe surface tends to have stain or the like, weather resistance lowers,and a practical problem occurs if it is less than 67%. If it exceeds75%, melting also becomes difficult.

The reason why Al₂O₃ component has been set to 0.5-3.0% by weight % isthat weather resistance lowers, the surface tends to have stain or thelike, and a practical problem occurs if it is less than 0.5%. On theother hand, if it exceeds 3%, devitrification tends to occur. Therefore,the forming temperature range becomes narrow, resulting in difficulty inproduction.

The reason why CaO component has been set to 7.0-11.0% by weight % isthat the melting temperature becomes high since flux tends to beinsufficient, and the production becomes difficult since the flowtemperature does not become low, if it is less than 7.0%. On the otherhand, if it exceeds 11%, devitrification tends to occur, and theproduction becomes difficult since the forming operation range becomesnarrow.

The reason why MgO component has been set to 2.0-4.2% by weight % isthat the melting temperature increases to narrow the operation range,thereby making the production difficult, if it is less than 2.0%, andthat meltability becomes inferior if it exceeds 4.2%.

The reason why Na₂O component has been set to 12.0-16.0% by weight % isthat meltability becomes inferior and tempering easiness lowers, formingbecomes difficult, and the production becomes difficult sincedevitrification tends to occur and the operation range narrows, if it isless than 12.0. On the other hand, if it exceeds 16%, weather resistancelowers, and the surface tends to have stain or the like, resulting inthe occurrence of a practical problem.

The reason why K₂O component has been set to 0.5-3.0% is that temperingeasiness lowers if it is less than 0.5%, and weather resistance lowersand the cost increases if it is greater than 3.0%.

The reason why SO₃ component has been set to 0.05-0.3% is that, forexample, deforming or homogeneity tends to become insufficient in normalmelting if it is less than 0.05%. If it exceeds 0.3%, the coloringcondition of glass is particularly affected. For example, it tends tohave a color tone of yellow or amber-like color, and it becomesimpossible to obtain a desired greenish color tone. It is preferably0.1-0.2%.

The reason why the total of the components of SiO₂, Al₂O₃, CaO, MgO,Na₂O, K₂O, SO₃, Fe₂O₃, CeO₂ and TiO₂ has been set to 98% or greater byweight percent in the first glass is that the total of minor components,such as CoO, Cr₂O₃ and SnO, which may be added in some cases, is madenot to exceed 2%.

The reason why the total of the components of SiO₂, Al₂O₃, CaO, MgO,Na₂O, K₂O, SO₃, Fe₂O₃, CeO₂ and TiO₂ has been set to 98% or greater byweight percent in the second glass is that the total of minorcomponents, such as CoO, Cr₂O₃, V₂O₅ and MoO, which may be added in somecases, is made not to exceed 2%.

Furthermore, the reason why SiO₂+Al₂O₃+TiO₂ has been set to 70-76% byweight percent is that weather resistance lowers if it is less than 70%and that a problem of the decrease of tempering easiness occurs if it isgreater than 76%. It is preferably about 70-74%.

The reason why CaO+MgO has been set to 10-15% by weight percent to useCaO and MgO components for lowering the melting temperature.Furthermore, tempering easiness lowers if it is less than 10%. If itexceeds 15%, devitrification tends to occur, thereby making theproduction difficult. It is preferably about 11.5-15%.

The reason why Na₂O+K₂O has been set to 13-17% by percent is thattempering easiness lowers, devitrification also tends to occur, and theoperation temperature range upon forming narrows, thereby making theproduction difficult, if it is less than 13%. On the other hand, if itexceeds 17%, weather resistance lowers, a practical problem occurs, andthe cost increases.

Furthermore, there is preferable an ultraviolet and infrared absorptivegreenish glass in which FeO/Fe₂O₃ is 0.3-0.6 in weight ratio expressionand CeO₂/TiO₂ is 0.7-1.3 in weight ratio expression. FeO and Fe₂O₃ aregenerally different in their functions. Mainly, Fe₂O₃ has a considerableinfluence on the ultraviolet region, and FeO has a considerableinfluence on the infrared region. Therefore, although they are the sameiron components, it is preferable to control their proportions. IfFeO/Fe₂O₃ in weight ratio expression is less than 30%, there occurs aproblem in which infrared absorption is low, resulting in too high solarradiation transmittance. On the other hand, FeO/Fe₂O₃ in weight ratioexpression exceeds 0.6, the solar radiation transmittance becomes low;however, there occurs a problem in which the color tone of glass becomestoo blue. More preferably, it is in a range of 0.4-0.6.

CeO₂ and TiO₂ have an absorptive function/effect of mainly ultravioletrays. However, they are different from each other in terms of influenceon the absorptive function of ultraviolet rays and make a difference incolor tone. Therefore, it is preferable to set the range of CeO₂/TiO₂ inweight ratio expression. If CeO₂/TiO₂ in weight ratio expression is lessthan 0.7, there occurs a problem of insufficient ultraviolet absorptiveaction. On the other hand, if CeO₂/TiO₂ in weight ratio expressionexceeds 1.3, there occurs a problem in which the color tone of glasstends to become bluish or yellowish in relation with other coloring rawmaterials. More preferably, it is in a range of 0.8-1.2. Furtherpreferably, it is in a range of 0.85-1.15.

An ultraviolet and infrared absorptive greenish glass having a solarradiation transmittance (T_(s)) of 48% or less is preferable. If itexceeds 48%, for example, the cooling load increases, therebycontradicting with global warming phenomena and environmental problems.That is, if it exceeds 48%, the cooling load increases, or the actualfeeling of the effect of improving inhabitability of car or roominterior diminishes. In particular, it becomes difficult to eliminateuncomfortableness in midsummer or the like. Therefore, it becomesimpossible to sufficiently obtain the energy saving effect.

Furthermore, an ultraviolet and infrared absorptive greenish glasshaving a dominant wavelength (D) by D₆₅ light source of 510-560 nm andan excitation purity (Pe) of 10% or less is preferable. This dominantwavelength (D) and the excitation purity (Pe) are useful for settingcoloring of the ultraviolet and infrared absorptive greenish glass. Asthe color tone, the dominant wavelength (D) by D₆₅ light source ispreferably in 510-560 nm. If the dominant wavelength (D) by D₆₅ lightsource is in a region shorter than 510 nm, the color tone of green colorbecomes unsharp, and it becomes a so-called bluish color, resulting inno match with market needs preferring “deep green color”. On the otherhand, if the dominant wavelength (D) by D₆₅ light source exceeds 560 nm,a yellow color or amber color increases. This also does not match withmarket needs preferring “deep green color”. More preferably, it is arange of 520-540 nm. On the other hand, if excitation purity (Pe)exceeds 10%, it becomes too strong; resulting in no match with recentmarket needs preferring an “elegant” coloring.

Furthermore, it is preferable that 5-50 ppm of Cr₂O₃ is contained as acoloring component in weight % expression. If it is less than 5 ppm,there occurs a problem in which the color tone of glass becomes ayellowish color tone. On the other hand, if it exceeds 30 ppm, thereoccurs a problem in which the visible light transmittance become toolow. More preferably, it is a range of 10-25 ppm.

Although MnO is not essential, the addition of 200 ppm or less ispreferable. This is because MnO has an effect of reduction action.However, if it exceeds 200 ppm, there occurs a problem in which thereduction action becomes too strong and amber tends to occur. Therefore,it is not preferable.

In the first glass, although SnO is not essential, it may be added in1.0% or less. This is because SnO has an effect of reduction action.However, if it exceeds 1.0%, there occur problems in which the reductionaction becomes too strong and amber tends to occur and in which thecolor tone of glass becomes a strongly bluish color tone. Therefore, itis not preferable.

To produce an ultraviolet and infrared absorptive greenish glass of thepresent invention, it is optional to use a frit glass, cutlet or thelike containing coloring components such as Fe₂O₃, CeO₂, TiO₂, FeO,Cr₂O₃, MnO, and SnO. The quantitative adjustment of these componentstends to become stable. Inclusion of FeO into glass becomes easy. Theoperation can be conducted in a manner to stabilize theoxidation-reduction condition of glass without greatly changingoperation conditions and the like of the actual furnace. Upon adding theabove-mentioned coloring components, it is possible to use carbon or ametal powder or oxide or the like of Zn. It is effective for the case ofsecuring color tone or the like, for example, while helping finingfunction/effect by mirabilite (Na₂SO₄) or the like. Furthermore, in somecases, in the atmosphere of the adjustment region of glass furnace, thestabilization may be achieved by introducing nitrogen gas or its mixedgas or combustion exhaust gas.

An ultraviolet and infrared absorptive greenish glass of the presentinvention contains an easy-tempering glass composition, too. It iseffective particularly for thin plate glasses having a plate thicknessof about 1.5-3.5 mm, which are strength-increased products,semi-tempered products and tempered products as flat plates or curvedplates. They can be used particularly as window glasses such asautomobiles and train vehicles. It is possible to use them asarchitectural window members from thin plate glasses having a platethickness of about 1 mm to thick plate glasses having a plate thicknessof about 25 mm, as single plate glass, laminated glass, lamination glassor double glazing.

The following examples are illustrative of the present invention. Inparticular, the following Examples 1-1 to 1-5 correspond to the firstglass of the present invention, and Examples 2-1 to 2-5 correspond tothe second glass of the present invention. As stated above, however, thesecond glass is one example of the first glass. Therefore, it isneedless to say that Examples 2-1 to 2-5 correspond to the first glass,too.

Example 1-1

As glass raw materials, there were used silica sand, feldspar, soda ash,dolomite, limestone, mirabilite, rouge, titanium oxide, and ceriumcarbonate. Furthermore, there were also used chemical reagents of Al₂O₃,Fe₂O₃, CaCO₃, MgCO₃, Na₂CO₃, K₂CO₃, CeO₂ and TiO₂, in addition toilmenite, carbon and slug. Using these, a predetermined glasscomposition was previously set as a target composition, and they wereweighed and mixed together. As a raw material batch, mirabilite/(siliconsand+feldspar) was adjusted to about 1%, and cutlet was adjusted toabout 50%.

The mixed raw material was put into a crucible. It was melted for about3-4 hours for vitrification in an actual furnace (for example, a wallportion on a lateral side of an inlet, a side wall portion of acondition portion), which was maintained at about 1450° C., or in anelectric furnace made to be similar to the actual furnace while usingnitrogen gas or a mixed gas containing the gas or the like. Furthermore,it was maintained at 1420-1430° C. for about 2 hr for homogenization andfining. Then, it was poured into mold. It was cut into a glass platehaving a size of 100 mm×100 mm and a thickness of about 3.5 mm as aglass block, or the glass was allowed to flow out to form a plate havinga size of 100 mm×100 mm and a thickness of about 3.5 mm. Then, it wasground and polished, thereby obtaining each sample.

The glass component composition (weight %) of this sample was measuredby a wet analysis according to JIS R-3101 or the like, and its opticalcharacteristics were measured by a 340-type automated spectrophotometermade by Hitachi Ltd. and JIS Z-8722, JIS R-3106 and ISO/DIS 9050.

The glass composition was in weight expression 70.1% SiO₂, 1.8% Al₂O₃,8.2% CaO, 3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.42% total Fe₂O₃,1.1% CeO₂, 1.1% TiO₂, and 17 ppm Cr₂O₃. FeO was in 0.21%. FeO/Fe₂O₃ was0.5 in weight ratio expression. CeO₂/TiO₂ was 1.0 in weight ratioexpression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 99.9%.SiO₂+Al₂O₃+TiO₂ was in 72.8%. CaO+MgO was in 11.8%. Na₂O+K₂O was in13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 4.6%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 78%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 10%. The visible light transmittance(T_(v)) by A light source was in 68%. The solar radiation transmittance(T_(s)) was in 36%. The dominant wavelength (D) by D₆₅ light source wasin 535 nm. Excitation purity (Pe) was in 5%. The measurement results,converted to 5 mm thickness, of transmittance relative to wavelength areshown in FIG. 1. It is understood that transmittance of ultraviolet andinfrared region is low and that it has a characteristic of ultravioletabsorption and infrared absorption.

Example 1-2

Using glass raw materials almost similar to Example 1-1, an examinationwas continued by changing the glass composition. As a result, the glasscomposition was in weight expression 70.2% SiO₂, 1.8% Al₂O₃, 8.2% CaO,3.6% MgO, 12.7% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.32% total Fe₂O₃, 1.0% CeO₂,1.0% TiO₂, and 13 ppm Cr₂O₃. FeO was in 0.15%. FeO/Fe₂O₃ was 0.47 inweight ratio expression. CeO₂/TiO₂ was 1.0 in weight ratio expression.The total of SiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnOwas in 99.8%. SiO₂+Al₂O₃+TiO₂ was in 73.0%. CaO+MgO was in 11.8%.Na₂O+K₂O was in 13.8%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 8.5%. 350 nm wavelength transmittance (T₃₅₀) was in 1%. 550 nmwavelength transmittance (T₅₅₀) was in 79%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 21%. The visible light transmittance(T_(v)) by A light source was in 75%. The solar radiation transmittance(T_(s)) was in 46%. The dominant wavelength (D) by D₆₅ light source wasin 543 nm. Excitation purity (Pe) was in 4%.

Example 1-3

Using glass raw materials almost similar to Example 1-1, an examinationwas continued by changing the glass composition. As a result, the glasscomposition was in weight expression 69.5% SiO₂, 1.6% Al₂O₃, 8.0% CaO,3.7% MgO, 12.4% Na₂O, 1.0% K₂O, 0.1% SO₃, 0.32% total Fe₂O₃, 1.4% CeO₂,1.9% TiO₂, 7 ppm Cr₂O₃, 180 ppm MnO, and 0.2% SnO₂. FeO was in 0.135%.FeO/Fe₂O₃ was 0.42 in weight ratio expression. CeO₂/TiO₂ was 0.7 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 99.9%.SiO₂+Al₂O₃+TiO₂ was in 73.0%. CaO+MgO was in 11.7%. Na₂O+K₂O was in13.4%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 4.4%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 76%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 20%. The visible light transmittance(T_(v)) by A light source was in 73%. The solar radiation transmittance(T_(s)) was in 46%. The dominant wavelength (D) by D₆₅ light source wasin 550 nm. Excitation purity (Pe) was in 3%.

Example 1-4

Using glass raw materials almost similar to Example 1-1, an examinationwas continued by changing the glass composition. As a result, the glasscomposition was in weight expression 70.3% SiO₂, 1.7% Al₂O₃, 8.2% CaO,3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.45% total Fe₂O₃, 1.0% CeO₂,1.0% TiO₂, 20 ppm Cr₂O₃, 80 ppm MnO, and 0.2% SnO₂. FeO was in 0.158%.FeO/Fe₂O₃ was 0.30 in weight ratio expression. CeO₂/TiO₂ was 1.0 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 99.8%.SiO₂+Al₂O₃+TiO₂ was in 73.0%. CaO+MgO was in 11.8%. Na₂O+K₂O was in13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 4.0%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 72%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 8%. The visible light transmittance (T_(v))by A light source was in 67%. The solar radiation transmittance (T_(s))was in 34%. The dominant wavelength (D) by D₆₅ light source was in 535nm. Excitation purity (Pe) was in 5%.

Example 1-5

Using glass raw materials almost similar to Example 1-1, an examinationwas continued by changing the glass composition. As a result, the glasscomposition was in weight expression 69.3% SiO₂, 1.6% Al₂O₃, 8.2% CaO,3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.38% total Fe₂O₃, 1.8% CeO₂,1.4% TiO₂, 25 ppm Cr₂O₃, and 80 ppm MnO. FeO was in 0.200%. FeO/Fe₂O₃was 0.53 in weight ratio expression. CeO₂/TiO₂ was 1.3 in weight ratioexpression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 99.9%.SiO₂+Al₂O₃+TiO₂ was in 72.3%. CaO+MgO was in 11.8%. Na₂O+K₂O was in13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 3.5%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 70%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 13%. The visible light transmittance(T_(v)) by A light source was in 76%. The solar radiation transmittance(T_(s)) was in 45%. The dominant wavelength (D) by D₆₅ light source wasin 550 nm. Excitation purity (Pe) was in 5%.

Comparative Example 1-1

Using glass raw materials almost similar to Example 1-1, the coloringraw materials in the glass composition were changed. As a result, theglass composition was in weight expression 71.2% SiO₂, 1.9% Al₂O₃, 8.3%CaO, 3.7% MgO, 13.0% Na₂O, 0.9% K₂O, 0.2% SO₃, 0.62% total Fe₂O₃, 0.1%TiO₂, and 7 ppm CoO. FeO was in 0.12%. FeO/Fe₂O₃ was 0.19 in weightratio expression. CeO₂/TiO₂ was 0 in weight ratio expression. The totalof SiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in99.9%. SiO₂+Al₂O₃+TiO₂ was in 73.2%. CaO+MgO was in 12.0%. Na₂O+K₂O wasin 13.9%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 25%. 350 nm wavelength transmittance (T₃₅₀) was in 20%. 550 nmwavelength transmittance (T₅₅₀) was in 79%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 24%. The visible light transmittance(T_(v)) by A light source was in 76%. The solar radiation transmittance(T_(s)) was in 50%. The dominant wavelength (D) by D₆₅ light source wasin 500 nm. Excitation purity (Pe) was in 3%. The measurement results,converted to 5 mm thickness, of transmittance relative to wavelength,together with the results of Example 1, are shown in FIG. 1. Although itis a greenish glass, its transmittance of ultraviolet rays and infraredrays is high, and its characteristics are different from those of theultraviolet and infrared absorptive glass of Example 1-1.

Comparative Example 1-2

Using glass raw materials almost similar to Example 1-1, the coloringraw materials in the glass composition were changed. As a result, theglass composition was in weight expression 70.1% SiO₂, 1.6% Al₂O₃, 8.2%CaO, 3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.62% total Fe₂O₃, 0.7%CeO₂, 0.5% TiO₂, 55 ppm Cr₂O₃, and 220 ppm MnO. FeO was in 0.15%.FeO/Fe₂O₃ was 0.25 in weight ratio expression. CeO₂/TiO₂ was 1.4 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 98.9%.SiO₂+Al₂O₃+TiO₂ was in 72.2%. CaO+MgO was in 11.8%. Na₂O+K₂O was in13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 10%. 350 nm wavelength transmittance (T₃₅₀) was in 2.2%. 550 nmwavelength transmittance (T₅₅₀) was in 65%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 18%. The visible light transmittance(T_(v)) by A light source was in 73%. The solar radiation transmittance(T_(s)) was in 45%. The dominant wavelength (D) by D₆₅ light source wasin 506 nm. Excitation purity (Pe) was in 3%.

Comparative Example 1-3

Using glass raw materials almost similar to Example 1-2, the coloringraw materials in the glass composition were changed. As a result, theglass composition was in weight expression 68.5% SiO₂, 1.8% Al₂O₃, 8.2%CaO, 3.6% MgO, 12.7% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.32% total Fe₂O₃, 0.80%CeO₂, 3.0% TiO₂, 20 ppm Cr₂O₃, and ppm MnO. FeO was in 0.08%. FeO/Fe₂O₃was 0.25 in weight ratio expression. CeO₂/TiO₂ was 0.27 in weight ratioexpression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 99.9%.SiO₂+Al₂O₃+TiO₂ was in 73.3%. CaO+MgO was in 11.8%. Na₂O+K₂O was in13.6%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 4.2%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 83%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 30%. The visible light transmittance(T_(v)) by A light source was in 79%. The solar radiation transmittance(T_(s)) was in 53%. The dominant wavelength (D) by D₆₅ light source wasin 595 nm. Excitation purity (Pe) was in 6%.

Comparative Example 1-4

Using glass raw materials almost similar to Example 1-1, the coloringraw materials in the glass composition were changed. As a result, theglass composition was in weight expression 70.1% SiO₂, 1.8% Al₂O₃, 8.2%CaO, 3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.42% total Fe₂O₃, 0.5%CeO₂, and 0.5% TiO₂. FeO was in 0.21%. FeO/Fe₂O₃ was 0.5 in weight ratioexpression. CeO₂/TiO₂ was 1.0 in weight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 98.7%.SiO₂+Al₂O₃+TiO₂ was in 72.4%. CaO+MgO was in 11.8%. Na₂O+K₂O was in13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 15.0%. 350 nm wavelength transmittance (T₃₅₀) was in 3.0%. 550 nmwavelength transmittance (T₅₅₀) was in 75%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 12%. The visible light transmittance(T_(v)) by A light source was in 72%. The solar radiation transmittance(T_(s)) was in 25%. The dominant wavelength (D) by D₆₅ light source wasin 500 nm. Excitation purity (Pe) was in 10%.

Comparative Example 1-5

Using glass raw materials almost similar to Example 1-1, the parentcomposition, together with the coloring raw materials in the glasscomposition, was partly changed. As a result, there was obtained a glasshaving a composition in weight expression of 69.4% SiO₂, 1.6% Al₂O₃,8.2% CaO, 3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.28% total Fe₂O₃,2.2% CeO₂, 1.0% TiO₂, 17 ppm Cr₂O₃, and 2.2% ZnO. FeO was in 0.13%.FeO/Fe₂O₃ was 0.46 in weight ratio expression. CeO₂/TiO₂ was 2.2 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+Cr₂O₃+MnO was in 99.9%.SiO₂+Al₂O₃+TiO₂ was in 72.0%. CaO+MgO was in 11.8%. Na₂O+K₂O was in13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 2.5%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 78%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 35%. The visible light transmittance(T_(v)) by A light source was in 78%. The solar radiation transmittance(T_(s)) was in 55%. The dominant wavelength (D) by D₆₅ light source wasin 595 nm. Excitation purity (Pe) was in 11%.

Example 2-1

As glass raw materials, there were used silica sand, feldspar, soda ash,dolomite, limestone, mirabilite, rouge, titanium oxide, and ceriumcarbonate. Furthermore, there were also used chemical reagents of Al₂O₃,Fe₂O₃, CaCO₃, MgCO₃, Na₂CO₃, K₂CO₃, CeO₂, TiO₂ and SnO, in addition toilmenite and slug. Using these, a predetermined glass composition waspreviously set as a target composition, and they were weighed and mixedtogether. As a raw material batch, mirabilite/(silicon sand+feldspar)was adjusted to about 1%, and cullet was adjusted to about 50%.

The same steps as those of Example 1-1 were conducted by using the abovemixed raw material. The resulting sample was subjected to the sameanalyses as those of Example 1-1.

The glass composition was in weight expression 69.9% SiO₂, 1.7% Al₂O₃,8.2% CaO, 3.6% MgO, 12.7% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.38% total Fe₂O₃,1.0% CeO₂, 1.0% TiO₂, 0.5% SnO and 17 ppm Cr₂O₃. FeO was in 0.17%.FeO/Fe₂O₃ was 0.5 in weight ratio expression. CeO₂/TiO₂ was 1.0 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+MnO was in99.9%. SiO₂+Al₂O₃+TiO₂ was in 72.6%. CaO+MgO was in 11.8%. Na₂O+K₂O wasin 13.6%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 6.0%. 350 nm wavelength transmittance (T₃₅₀) was in 0.7%. 550 nmwavelength transmittance (T₅₅₀) was in 75%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 17%. The visible light transmittance(T_(v)) by A light source was in 71%. The solar radiation transmittance(T_(s)) was in 41%. The dominant wavelength (D) by D₆₅ light source wasin 525 nm. Excitation purity (Pe) was in 4%. The measurement results oftransmittance relative to wavelength are shown in FIG. 1. It isunderstood that transmittance of ultraviolet and infrared region is lowand that it has a characteristic of ultraviolet absorption and infraredabsorption.

Example 2-2

Using glass raw materials almost similar to Example 2-1, an examinationwas conducted by changing the glass composition. As a result, the glasscomposition was in weight expression 69.7% SiO₂, 1.6% Al₂O₃, 8.2% CaO,3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.47% total Fe₂O₃, 1.0% CeO₂,1.0% TiO₂, 0.6% SnO and 13 ppm Cr₂O₃. FeO was in 0.19%. FeO/Fe₂O₃ was0.40 in weight ratio expression. CeO₂/TiO₂ was 1.0 in weight ratioexpression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+Mn O was in99.9%. SiO₂+Al₂O₃+TiO₂ was in 72.5%. CaO+MgO was in 11.8%. Na₂O+K₂O wasin 13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 4.5%. 350 nm wavelength transmittance (T₃₅₀) was in 0.3%. 550 nmwavelength transmittance (T₅₅₀) was in 73%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 13%. The visible light transmittance(T_(v)) by A light source was in 71%. The solar radiation transmittance(T_(s)) was in 37%. The dominant wavelength (D) by D₆₅ light source wasin 530 nm. Excitation purity (Pe) was in 4%.

Example 2-3

Using glass raw materials almost similar to Example 2-1, an examinationwas continued by changing the glass composition. As a result, the glasscomposition was in weight expression 69.6% SiO₂, 1.6% Al₂O₃, 8.0% CaO,3.7% MgO, 12.4% Na₂O, 1.0% K₂O, 0.1% SO₃, 0.32% total Fe₂O₃, 1.2% CeO₂,1.5% TiO₂, 0.4% SnO, 7 ppm Cr₂O₃ and 180 ppm MnO. FeO was in 0.135%.FeO/Fe₂O₃ was 0.47 in weight ratio expression. CeO₂/TiO₂ was 0.8 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+MnO was in99.8%. SiO₂+Al₂O₃+TiO₂ was in 72.7%. CaO+MgO was in 11.7%. Na₂O+K₂O wasin 13.4%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 4.4%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 76%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in. 23%. The visible light transmittance(T_(v)) by A light source was in 72%. The solar radiation transmittance(T_(s)) was in 45%. The dominant wavelength (D) by D₆₅ light source wasin 535 nm. Excitation purity (Pe) was in 3%.

Example 2-4

Using glass raw materials almost similar to Example 2-1, an examinationwas continued by changing the glass composition. As a result, the glasscomposition was in weight expression 70.1% SiO₂, 1.7% Al₂O₃, 8.2% CaO,3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.45% total Fe₂O₃, 1.0% CeO₂,1.0% TiO₂, 0.2% SnO, 15 ppm Cr₂O₃ and 184 ppm MnO. FeO was in 0.158%.FeO/Fe₂O₃ was 0.30 in weight ratio expression. CeO₂/TiO₂ was 1.0 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+MnO was in99.9%. SiO₂+Al₂O₃+TiO₂ was in 72.8%. CaO+MgO was in 11.8%. Na₂O+K₂O wasin 13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 5.1%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 76%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 24%. The visible light transmittance(T_(v)) by A light source was in 72%. The solar radiation transmittance(T_(s)) was in 47%. The dominant wavelength (D) by D₆₅ light source wasin 550 nm. Excitation purity (Pe) was in 5%.

Example 2-5

Using glass raw materials almost similar to Example 2-1, an examinationwas continued by changing the glass composition. As a result, the glasscomposition was in weight expression 69.6% SiO₂, 1.6% Al₂O₃, 8.2% CaO,3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.38% total Fe₂O₃, 1.5% CeO₂,1.2% TiO₂, 0.3% SnO, 16 ppm Cr₂O₃ and 180 ppm MnO. FeO was in 0.13%.FeO/Fe₂O₃ was 0.35 in weight ratio expression. CeO₂/TiO₂ was 1.3 inweight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+MnO was in99.9%. SiO₂+Al₂O₃+TiO₂ was in 72.4%. CaO+MgO was in 11.8%. Na₂O+K₂O wasin 13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 4.2%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 77%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 25%. The visible light transmittance(T_(v)) by A light source was in 73%. The solar radiation transmittance(T_(s)) was in 47%. The dominant wavelength (D) by D₆₅ light source wasin 550 nm. Excitation purity (Pe) was in 5%.

Comparative Example 2-1

Using glass raw materials almost similar to Example 1, the coloring rawmaterials in the glass composition were changed. As a result, the glasscomposition was in weight expression 71.1% SiO₂, 1.9% Al₂O₃, 8.3% CaO,3.6% MgO, 13.0% Na₂O, 0.8% K₂O, 0.1% SO₃, 0.54% total Fe₂O₃, 0.1% TiO₂,and 17 ppm Cr₂O₃. FeO was in 0.13%. FeO/Fe₂O₃ was 0.26 in weight ratioexpression. CeO₂/TiO₂ was 0 in weight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+Mn O was in99.9%. SiO₂+Al₂O₃+TiO₂ was in 73.1%. CaO+MgO was in 11.9%. Na₂O+K₂O wasin 13.8%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 29%. 350 nm wavelength transmittance (T₃₅₀) was in 20%. 550 nmwavelength transmittance (T₅₅₀) was in 79%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 27%. The visible light transmittance(T_(v)) by A light source was in 76%. The solar radiation transmittance(T_(s)) was in 52%. The dominant wavelength (D) by D₆₅ light source wasin 500 nm. Excitation purity (Pe) was in 3%. The measurement results oftransmittance relative to wavelength, together with the results ofExample 1, are shown in FIG. 1. Although it is a greenish glass, itstransmittance of ultraviolet rays and infrared rays is high, and itscharacteristics are different from those of the ultraviolet and infraredabsorptive glass of Example 1-1.

Comparative Example 2-2

Using glass raw materials almost similar to Example 2-1, the coloringraw materials in the glass composition were changed. As a result, theglass composition was in weight expression 70.1% SiO₂, 1.6% Al₂O₃, 8.2%CaO, 3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.62% total Fe₂O₃, 0.7%CeO₂, 0.6% TiO₂, 0.9% SnO, 35 ppm Cr₂O₃ and 220 ppm MnO. FeO was in0.30%. FeO/Fe₂O₃ was 0.53 in weight ratio expression. CeO₂/TiO₂ was 1.2in weight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+MnO was in98.9%. SiO₂+Al₂O₃+TiO₂ was in 72.2%. CaO+MgO was in 11.8%. Na₂O+K₂O wasin 13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 10%. 350 nm wavelength transmittance (T₃₅₀) was in 2.2%. 550 nmwavelength transmittance (T₅₅₀) was in 65%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 6%. The visible light transmittance (T_(v))by A light source was in 60%. The solar radiation transmittance (T_(s))was in 31%. The dominant wavelength (D) by D₆₅ light source was in 506nm. Excitation purity (Pe) was in 5%.

Comparative Example 2-3

Using glass raw materials almost similar to Example 2-2, the coloringraw materials in the glass composition were changed. As a result, theglass composition was in weight expression 68.5% SiO₂, 1.8% Al₂O₃, 8.2%CaO, 3.6% MgO, 12.7% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.25% total Fe₂O₃, 0.9%CeO₂, 1.8% TiO₂, 0.9% SnO, 35 ppm Cr₂O₃ and 180 ppm MnO. FeO was in0.10%. FeO/Fe₂O₃ was 0.46 in weight ratio expression. CeO₂/TiO₂ was 0.5in weight ratio expression. The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+MnO was in99.9%. SiO₂+Al₂O₃+TiO₂ was in 73.3%. CaO+MgO was in 11.8%. Na₂O+K₂O wasin 13.6%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 6.1%. 350 nm wavelength transmittance (T₃₅₀) was in 0.3%. 550 nmwavelength transmittance (T₅₅₀) was in 70%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 29%. The visible light transmittance(T_(v)) by A light source was in 66%. The solar radiation transmittance(T_(s)) was in 54%. The dominant wavelength (D) by D₆₅ light source wasin 540 nm. Excitation purity (Pe) was in 5%.

Comparative Example 2-4

Using glass raw materials almost similar to Example 2-1, the coloringraw materials in the glass composition were changed. As a result, theglass composition was in weight expression 70.1% SiO₂, 1.8% Al₂O₃, 8.2%CaO, 3.6% MgO, 12.6% Na₂O, 0.9% K₂O, 0.1% SO₃, 0.63% total Fe₂O₃, 1.8%CeO₂, 0.9% TiO₂, and 0.9% SnO. FeO was in 0.20%. FeO/Fe₂O₃ was 0.35 inweight ratio expression. CeO₂/TiO₂ was 2.0 in weight ratio expression.The total ofSiO₂+Al₂O₃+Fe₂O₃+CaO+MgO+Na₂O+K₂O+SO₃+CeO₂+TiO₂+SnO+Cr₂O₃+MnO was in98.7%. SiO₂+Al₂O₃+TiO₂ was in 72.4%. CaO+MgO was in 11.8%. Na₂O+K₂O wasin 13.5%.

The ultraviolet transmittance (T_(uv)) by ISO/DIS9050 at 5 mm thicknesswas in 3%. 350 nm wavelength transmittance (T₃₅₀) was in 0%. 550 nmwavelength transmittance (T₅₅₀) was in 64%. 1100 nm wavelengthtransmittance (T₁₁₀₀) was in 13%. The visible light transmittance(T_(v)) by A light source was in 59%. The solar radiation transmittance(T_(s)) was in 38%. The dominant wavelength (D) by D₆₅ light source wasin 530 nm. Excitation purity (Pe) was in 7%.

1. In a soda-lime-silica series glass, an ultraviolet and infraredabsorptive greenish glass, which is characterized in that, in anexpression of weight %, it comprises at least coloring components of0.3-0.5% of total Fe₂O₃, 0.8-2.0% CeO₂, 0.8-2.0% TiO₂, and 0.10-0.25%FeO, that CeO₂/TiO₂ is 0.7-1.3 in weight ratio expression, and that theglass at 5 mm thickness is 9% or less in ultraviolet transmittance(T_(uv)) according to ISO/DIS9050, 1% or less in 350 nm wavelengthtransmittance (T₃₅₀), 70% or greater in 550 nm wavelength transmittance(T₅₅₀), and 25% or less in 1100 nm wavelength transmittance (T₁₁₀₀). 2.An ultraviolet and infrared absorptive greenish glass according to claim1, which is characterized in that, in an expression of weight %, itcomprises 67-75% SiO₂, 0.5-3.0% Al₂O₃, 7.0-11.0% CaO, 2.0-4.2% MgO,12-16% Na₂O, 0.5-3.0% K₂O, and 0.05-0.3% SO₃ in addition to the coloringcomponents of the glass, that the sum of these components and thecoloring components is 98% or greater, and that SiO₂+Al₂O₃+TiO₂ amountsto 70-76%, CaO+MgO amounts to 10-15%, and Na₂O+K₂O amounts to 13-17%. 3.An ultraviolet and infrared absorptive greenish glass according to claim1, which is characterized in that FeO/Fe₂O₃ is 0.3-0.6 in weight ratioexpression.
 4. An ultraviolet and infrared absorptive greenish glassaccording to claim 1, which is characterized in that at 5 mm thicknessvisible light transmittance (T_(v)) by A light source is 67% or greater,solar radiation transmittance (T_(s)) is 48% or less, dominantwavelength (D) by D₆₅ light source is 510-560 nm, and excitation purity(Pe) is 10% or less.
 5. An ultraviolet and infrared absorptive greenishglass according to claim 1, which is characterized in comprising 5-50ppm Cr₂O₃, 0-200 ppm MnO and 0-1.0% SnO as coloring components in weight% expression.
 6. An ultraviolet and infrared absorptive greenish glassaccording to claim 1, which is characterized in that CeO₂ amounts to0.8-1.5% and TiO₂ amounts to 0.8-1.5%, and that it comprises at least0.1-0.7% SnO as a coloring component in weight % expression.
 7. Anultraviolet and infrared absorptive greenish glass according to claim 6,which is characterized in that it comprises in weight % expression67-75% SiO₂, 0.5-3.0% Al₂O₃, 7.0-11.0% CaO, 2.0-4.2% MgO, 12-16% Na₂O,0.5-3.0% K₂O, and 0.05-0.3% SO₃ in addition to the coloring componentsof the glass, that the sum of these components and the coloringcomponents is 98% or greater, and that SiO₂+Al₂O₃+TiO₂ amounts to70-76%, CaO+MgO amounts to 10-15%, and Na₂O+K₂O amounts to 13-17%.
 8. Anultraviolet and infrared absorptive greenish glass according to claim 6,which is characterized in that FeO/Fe₂O₃ is 0.3-0.6 in weight ratioexpression.
 9. An ultraviolet and infrared absorptive greenish glassaccording to claim 6, which is characterized in that at 5 mm thicknessvisible light transmittance (T_(v)) by A light source is 67% or greater,solar radiation transmittance (T_(s)) is 48% or less, dominantwavelength (D) by D₆₅ light source is 510-560 nm, and excitation purity(Pe) is 10% or less.
 10. An ultraviolet and infrared absorptive greenishglass according to claim 6, which is characterized in comprising 5-30ppm Cr₂O₃ and 0-200 ppm MnO as coloring components in weight expression.11. An ultraviolet and infrared absorptive greenish glass according toclaim 1, which is characterized in that dominant wavelength (D) by D₆₅light source is 520-540 nm.
 12. An ultraviolet and infrared absorptivegreenish glass according to claim 1, which is characterized in thatdominant wavelength (D) by D₆₅ light source is 525-550 nm.
 13. Anultraviolet and infrared absorptive greenish glass according to claim 6,which is characterized in that dominant wavelength (D) by D₆₅ lightsource is 520-540 nm.
 14. An ultraviolet and infrared absorptivegreenish glass according to claim 6, which is characterized in thatdominant wavelength (D) by D₆₅ light source is 525-550 nm.